#include <stdio.h>
#include <math.h>

void test_log10(int num)
{
	printf("%f\n", log10(num));
}

int two_log( void )  
{  
   double x = 9000.0;  
   double y;  
  
   y = log( x );  
   printf( "log( %.2f ) = %f\n", x, y );  
   y = log10( x );  
   printf( "log10( %.2f ) = %f\n", x, y );  
}  

void main(void)
{
	test_log10(100);

	two_log();
}
